Will you forgive me when I say goodbye?

Sirius was tortured with the Cruciatus Curse in order to get the vital information that lead to the prank. But the other 3 marauders don't know this, and it's very hard for Sirius to tell them when they won't talk to him. Then James says something. Something that shows Sirius how much his friends don't care what happens to him. He sees only one way to let all this pain go. Only one way for a chance of forgiveness. He tries to kill himself and it's then and only then that the others realize what they have done. But tragedy after tragedy keeps on repeating itself, and it doesn't seem likely that Sirius can keep it up much longer.